Surfacing machine



Aug. 29, 1933. w. H. WINEMAN SURFACING MACHINE Filed Oct. 17. 1929 2 Sheets-Sheet 1 1720672207. Zfiadafi Zflz'nwnan. y

Aug. 29, 1933. w; H, WINEMAN sunmcme mcam:

Filed Oct. 17, 1929 2 Sheets-Sheet 2 [72 0622202".- Zfladefi 202726772022. by A; 4- Zluwvu,

Patented Aug. 29, 1933 j of Massachusetts This invention relates to anjirnprovedmethod and apparatus for surfacing concrete or other artificial stone. More particularly, from'on'e of its aspects, this invention relates to a'grinding devicewhich is power driven and maybe employed for grindingthe surface of concrete or other artificial stone.

rial.

An object of this invention is to provide .an improved surfacing machinefor, use in grinding the surface of concrete or I other I rock-like matevide an improved? grinding mechanism which maybe power driven, and whichis adapted .to finish the surfaces of roadways,,side-walks, floors or'other hard surfaces fonned of concrete or other rock-like material A further; and more specific object of this invention is to provide :broken away.

improved'grindinghead for a surfacing machine.

Stillanother objectof the invention is to provide an improved method of grindingor smoothing rough surfaces. Further objects lof this invention will becom'e apparent in course-of the ensuing description and will bernore' particularly 5 pointed outin thefappended claims; 2

For purposes of illustration; there is shown a preferred embodiment of the inventiongin the accompanying drawings,in which" j 7 Fig. 1 is a viewin -side elevation of a" machine which illustrates I one embodiment of the invention., ,q p v Fig. .2 is agver tical sectional view .throughljthe left portion the machine shown in Figiilil H :3 is a-plan view showingfa detail of'the support for-the grinding mechanism of the machine, a .portioneof one of, the bearings being Fig.4 is a -sectional view of one .of the blocks which constitutes an elen'ientlof thelgrin'ding head, the view Ibeingitaken :on" line' Hi-prFigs. Fig. 5 is a plan .view ofc-the; grindingghead properand. .is taken .on lineof .Fig. 2. ,1Fig.,.6 is a horizontal section takenon line 6-6 of Fig. v2 and shows ,both the grinding head; and the guardsurrounding the same. "jf f F g. '7 is a sectional'detailf, 'ielw'l bowingthe grinding head attached to its driving vshaft with '8, tight fit. I

the grinding head todts drivingjshaft, in which provision is vmadefor a slight amount of universal vmotion of the grinding head. with respectto the disclosed in these drawings, f there is shown; a

ii trnck or frame .10 mounted pn three wheels; a

A further object of this invention is to pro-1 Rig. 8 is amodified arrangement for attaching sURFAomG MnonmE I Wade 'I-L' Winema'n, Michigancitv, assignor to Sullivan Machinery Compansyacorporation j 5 caster wheel i l and a'p'airfoff wheels 112 or t e ordinary type; 1 Above the wheels 12 is mounted an "internalcombustion engine 133 which drives the grinding head 14', being connected to the same by driving gearing "15 enclosediin the casings 16 g The caster wheel ll is mounted in a. vokefl8 When. the bar21 has been rotated) by pushing down the lever 23j,a.bolt 2'7 may be {passed through the perforation 26 so as toengage beneath the frame;10, and hold thegcasterwhel Qinfl operativeposition. When the operator wishes lar surfaces. formed of fconcrete or other artificial stone; .the iever 23i's' pressed dovvnvvardly sufii cientlvlto "permit the bolt 2* "to'be withdrawn.

elevated position (as shown. on dotted lines in Fig, 2) by passingthebolt27ethrough the perforation 26;so as to engage above; the frame'lO. J-

A head block or casing-30' is' providedwitha @32 .for :the grinding mechanism,'-ball bearings-33 flhecaster wheel ;11 is thenelevated orlatched in bore 31, within -which.:is housed the. driving shaft being provided adjacent the upper and lower ex tremities of the'bore 31, for maintaining'the shaft 1 32 in proper alin'ement; .A' collar 34 is. screwed onto the" shaft 32 adjacentthe lowerball'bear the bearings; A bevel: gear '35iis secured to the upper end of. the shaft 32,:this gear being driven by a small bevel pinion136' fixed to azshaft 3'7 .ro-

gear 39, with -Jwhich meshes a pir'n'onAO- secured to a shaft4l, which is driven by the engine 13.

Theendofthe shaft 41 .adjacentthe 'pinion4o is rotatably mounted, "by a ball bearing 42, in the casing 16. The casing .17 comprisesa cover 43' which maybe removedto secure access to the bevelfgearing; and the casing -16 comprisesfa cover 44'whichimay beremoved tosecure access to the spur gear 39 an'dpinion40. The casings and the block30 are bolted 'at 45to the '1orward end ofthe frame 10.

frameof the trucklo. A lever '23 may beinserted A in an opening 24 in the bar 21 soles torotate-Q the latter. An armfl25 projects radially from the .bar v21 and is perforated'at26 inits 0 .1 1 n to grind the sfurfa'ce of aside-walkorhther'simi- 90 ing 33 to hold'the latter in position, and likewise to sealqthe :bore .31 and. prevent accessof'dirt to 96 -tatablvmounted by means of ball bearings 38 in r the casing 16. Theshaft 37 is'dri ven by a spur j I formed as a bevel "gear 48,. it being evident that: 1 the gear. 48 may, if desired, be a separate gear.-

guard 57: maybe rotated by the ,operatorby' means of theliandle "51, andithe. opening '77 same. The upper 'portion'of the sleeve 46 is securedjto the sleeve 46. A bevel pinion 49 is secured to the lower end of a-shaftSO which-is rotatably mounted. in the head block and. a

hand, wheel 51 is providedffor rotating theshaft j 50.1,A plurality of arms52 (see Fig. 6) .extend downwardly and 'outwardly from the sleeve 46 V and a guard member 57 is loosely carried by the k lower ends of these arms. A bore'58 is formed: in thelower end of each arm; and a rod 59 is disposedin each bore. Each rod 59 is a loose fit forv its bore 58, and is slidable-relative: thereto,-

but cannot drop out of the hora-since downs 7 Ward movement is-limitedjby a pin;60 in the upper endof each rod 59. The lower ends of the rods are secured to the guard member57. To p'revent the'sl'eeve 16 from sliding downwardly on the cylind'ricalportion47, a collar 61 is screwed onto the lowe'rfend of the portion 47, a'setscrew -62 being 46lrotates in sliding engagement surface 63 of the collar 61.

Th grinding mechanism with the upper berfeachl of the four arms "78 of WhicI TCarries a' grinding block fid Eacheblock 66. is secured toitslrespectivearm byj'a bolt 67. Thesebolts are disp'osed at an angle of approximately 45 if; "with the horizontal due to a corresponding twist each arm Z8, and the blocked "is'dispos'ed at a complementary angle, the lowerportion of the .b1ock;6 6 being beveled so as to provide a1horizontal grinding surface 68; The grinding head 65 ;mfay be fixedly securedto the shaft 32 in the.

mannerishown in Fig: '7." In such case, the lower "end of fth'e:shaft 32 is Squared, as indicated at 70; andthe socket'll in the head 65 is correspond-- ingly squared. ,A bolt '72 is passed through both the'jhead 65 and the shaft 32, and securesthe 5 head in plac'elo'n the shaft. With this type of head, the grinding surfaces 68 are rotated in fixed relation withfrespect to the axis of the shaft 32. Y 7 ,v

1 -Wh'ere it isdesired 'to have the grinding head 'c'onform to the inequalities in the surface which isbeing-ground, a connection such as is illustrated 'in Fig. 8 maybe employed; In ethis'case' the squared'endfl l, of the shaft 32 does not fit a tightly within the similarly squared opening '75 in the head 65.1 This arrangement permits a 5 certain amount of playlbetween the head and theshaft32. Th'perforation- '76 in the shaft x32'which'receives the bolt 72 is larger'than the bolt, andrprovide'sa certain amount; ofiplay between the bolt 'and shaft .32, iwithuthis arrangement the head 65has a limited amountof 1 play in all directions to permit universal motion of axis of the shaftf32may be ground.

In the use 'o'f my improvedgrinding mechathehead 65"to1a limited extent; sothat a surface which isnotaexactly atright angleto the nism, a sludge composed of waterqandan" abra ;;sivej material is employed under theQ-rotating ;head. Thisabrasive material maycomprise water 'and'sand, or the cuttings from: the material .being-surfaced If desired metallic shot may be added to the abrasivamaterial. Since centrif- (V h U includesa grinding" head 65 shown in plan inFig. 5,. it being'constructed' in this embodiment as a cruciform mem 3 Letters Patent is outwardlyf An opening 77 ;in the guard) member- 5? permits the operator to move the chine overthe surface being ground, and collect the sludge beneath the grinding headf'Ihe turned iin the direction, ofmovement of the-1; machine. -The guard'5'7 rests'directly on the surface, and is free to adjust itself to the surface. Thus," as the machine is moved from place:

to place to treat various portions of the surface, the-sludge iscarried along by the guard- 5'7 and if any has been ,depositedon other portions'of the surface, the same may be brought back within the guard 5'7 through the opening" 7'7. 'The blocks "66 are easily replaceable as the same are worndown; It is obvious therefore 'that'I have provided a surfacing machine which 'is easily operatedpand which retains theabrasivematerial under the grinding head in an ,eflivcient,n ianner.

While there. is in this applicati epeafieiny described one "embodiment :which this invention may assume in practice, it will; be understood that this embod iment-of thesame is shown for scope of the'app'ende'd claims; I

J What I claim as'new and-desire to secure by 1, In a surfacing machine; a grindinghead substantial: opening, and meansfor rotating sa'id guard,"there being a lost'motion connection ver tically between saidguard and "said r otatingmeans. I

2". In a surfacing machine, wheeled'trucl r; e I a a 1 V a" grinding jhead rotatable on a vertical axis mounted in one end of said truclg, .a memberfor guid n a tru s iclf'm'ember being m n a y rotatableby the operator; a guard surrounding, V

manuallyirotatable member for rotating said' guard, there being lost' mo tionconnection v'ertically between said guard" and said rotating means. 1

3. In a,,surfacing machinaja wheeled truck,ll25. a; head block securedQto saidtruck a'vertical shaft rotatably mounted in said head-block; a

to a major extent; said headbut leavin as'ub- (l stantial openin g',"a nd'means actuatedby said grindinghead mountedon one endof said shaft for. rotating saidsleeve.

, '4.'In.a surfa'cing machinegawheeled truck,

a head block secured to said truck, a 'vertical shaft rotatably mounted in said head block; a]; v grindin'g'head mounted on one end of'said'shaft and driven thereby, a sleeve rotatable on the and driven thereby, a sleeve "rotatably' mounted on said head block, said sleeve'being"substantially 13 coaxial with saidvertical shaft, a guard forsaid fheadrotate'd :by said sleeve, therebeing a lost motion connection vertically between said "guard and said sleeve, and manually operable means axis of said vertical shaft, a pluralityfof depending arms carried by saidsleeve, a guard for said headjoperatively connected 'fto said arms "to'be rotated by 'said s1eeve, there' being a lostpfi'sz' motion connection between 'said guard and said sleeve whereby saidrguardmay rest-on'the sur- .face beingfabraded during normal operation of .the' machine, and manually operable means for rotating said guard.

5. In a surfacing machine, a 'wl'ieeled.trucl-: .1 5

ioo epurposesiof il-lustration'and thatthe invention may be modified and embodied in variousiothcr forms without departing from its spirit orthe.

a grinding head rotatable on a vertical axis mounted in one end of said truck, a guard surrounding, to a major extent, said head but leaving a substantial Opening, and meansfor rotate ing said guard, there being a lost motion connection vertically between said guard and said rotating means.

6. Agrinding head structure for surfacing machines including a support, a head mounted for rotation on said support and having grinding elements on its bottom surface, anda guard mounted on said support for vertical and rotary adjustment relative thereto andencircling, to a major extent, said head but leaving a'substantial lateral opening. r r

'7. A grinding head structure for surfacing machines including a support, a head mounted for rotation on said support and having grinding elements on its bottomsurface, a guard mounted on said support and encircling, to a majorextent, said head but leaving a substantial lateral opening, and means for adjusting said guard naled thereon, a grinding head connected to said drive element, a guard encircling said head and engaging the surface to be' ground, and a connection between said guard and support permitting free movement of said guard in a vertical direction to thereby adjust itself automatically' to the irregularities of ,the surface being ground.

9. A grinding head structure for surfacing machines including a support, a drive element journaled thereon, a grinding head connected to said drive element, a guard encircling said head and engaging thesurface to be ground, and a,

connection between said guard and support permitting free movement of said guard in a vertical direction touthereby adjust itselfautornatically to the irregularities of the surface being ground, said connection including cooperating sliding guide and guideway forming elements '2 carriedby said guard and support respectively.

10. A grinding head structure for surfacing said head to a major extent but leaving a lateral opening,and means operable at will for rotating said guard relative to said support to change head.

11. A grinding head structure for surfacing machines including a support, a grindingrhead rotatably mounted on said support, and a guard encircling and rotatable relative to said head and mounted on said supportfor rotation about the axis of said head and independently of the latter, said guard resting on the surface to be ground and supported thereby during adjustment thereof.

the position of said opening withirespect to said 12. A grinding head structure for surfacing machines including a support, a grinding head rotatably mounted on'said support, a guard en- WADE H. WINEMAN. 

